Again, more ridiculous thinking. The reception celebrates what just happened in the ceremony. One cannot celebrate something immoral.
No wonder the homosexual agenda has been so successful. People don't even think any more.
It's his cousin you smartass. That's family ill or will. You might not approve of gay weddings (I don't and most here don't either). As far as i am concerned the 'wedding' is a sham. Not sanctioned by the church and not recognized by any authority. They can call it what they want. By going to the reception he is not 'celebrating' the wedding in fact by not attending the wedding, he is sending the message that he doesn't approve it and furthermore put the onus on his cousin to disinvite him in attending the reception.
You go ahead and stand guard for the rest of us.